\\[-1.8ex] Soil Heterogeneity & $-$0.570$^{***}$ & $-$0.596$^{***}$ & $-$0.579$^{***}$ & $-$0.607$^{***}$ \\ 
  & (0.195) & (0.202) & (0.200) & (0.207) \\ 
\\[-1.8ex]
Dependent Variable Mean & 0.00 & 0.00 & 0.00 & 0.00 \\ 
Dependent Variable SD & 1.00 & 1.00 & 1.00 & 1.00 \\ 
Observations & 23,322 & 23,369 & 23,342 & 23,384 \\ 
R$^{2}$ & 0.332 & 0.337 & 0.332 & 0.337 \\ 
